<template>
    <h2>我是about</h2>
</template>
<script>
    export default {
        name: 'About',
        beforeDestroy() {
            console.log('about组件即将被销毁了');
        }, mounted() {
            console.log('about组件挂载完毕', this
            );
        }
    }
</script>
<style>
</style>